Value Of c

The speed of light is defined as the speed with which a light photon travels in the vacuum. It is denoted by alphabet c and measure using SI unit m/s. Value of velocity of light or value of c is a constant at any part of the universe. This physical constant has multiple application at various disciplines of physics.

Speed of light

The velocity of the light in the vacuum is –

The speed of light c = 299792458 m/s ≅ 3 × 108 m/s

The velocity of light can be expressed in terms of mph or km/s. That is-

  • The speed of light in mph 186,000 miles per hour
  • The speed of light in air is 299792 km/s

Hope you have learnt the value of c or the value of the speed of light in vacuum along with units of velocity.

Physics Related Topics:

Stay tuned with BYJU’S for more such interesting articles. Also, register to “BYJU’S-The Learning App” for loads of interactive, engaging physics related videos and an unlimited academic assist.

Practise This Question

A cylindrical vessel partially filled with water is rotated about its vertical central axis.  It’s surface will

Leave a Comment

Your email address will not be published. Required fields are marked *